Use of youtube videos

I am working on something for a stemcell research company (rock and roll) and they want to put a youtube vid into their site. It is an article on one of their employee's from the Guardian's youtube account.

I have no idea what the legality of this is! The video doesn't have embedding disabled, they don't want to change the video at all....

It is a perfect introduction to the man, so it seems strange to not use it, but as it is being used as a business promotional tool, does that change the right of usage?

I've tried googling this and reading t&c's, and can't make any sense of it!

you may need to check with the Guardian media division as I think they retain all rights to material posted on both the website and youtube. I think they typically allow material to be used however, but you do have pay a release fee.